Device for trapping particles in suspension in gas-currents.



T. E. MURRAY.

DEVICE EOE TEAPPING PARTICLES 1N SUSPENSION 1N GAS GUREENTS.

APPLICATION IILBD PEB. 4, 1913. 1,073,621 Patented Sept. 23, 1913.

THOMAS E. MURRAY; OF NEW YORK, N. Y.

DEVICE FOR TBAPPING PARTICLES IN SUSPENSION IN GAB-CURRENTS.

Specification of Letters VPatent.

Application led February 4, 1913. Serial No. 746,035.

To all 'whom t may concern.'

Be it known that I, THoMAs E. MURRAY, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented a certain new and useful Improvement in Devices forTrapping Particles in Suspension in Gas- Currents, of which thefollowing is a speeltication.

The object of the invention is to entrap the maximum' percentage ofsolid particles entrained with and suspended in a gas current.

The invention consists in the construction, hereinafter' set forth,whereby the cross-sectional areaY of the outlet of a vertical flue,throughwhichsaid particles are projected upon ,a body o'f' water, may bevaried, and whereby the' distance of said outlet from said water may besimultaneously altered.

. Inl the accompanying drawings-Figurelis a vertical section on' theline fr of Fig. 2' ofmy apparatus for trapping solid partieles insuspension in gas currents. Fig. 2 is ai vertical section of Big. l.

Similar letters of reference indicate like parts.

Ar'epresents a vertical stack or flue, which receives gas currents fromthe horizontal fines B and C. Said liues B and C may lead fromboiler-furnaces, in which case the gas currents therein will entraincinders or other solid particles' which it is the object of the presentdevice to remove before said currentsrpass to the stack A, and so to theatmospllere. As the arrangement of the device is the same with respectto each of the lues B and C, a description of the parts associated withone flue applies 4equally to both.

Extending inwardly from a wall, as D, of the stack, andabove the flue B,is a partition'- E. Said partition is bent downwardly, and thenupwardly, to form a glitter F, the outer edge' of safid tterbeingindented, as shown' in dotted lines Fig. l. Entering the stack wallGr, above partition E, is a pipe H which supplies water to the gutter F.Another water supply pipe J may, if desired, lead to the opposite end ofsaid gutter th-roughrthe stack wall K. The gutter F. receives thebentover upper edge L of a loose partition M, as shown on the right ofFig. 2, and when the partition is in this position, it is suspended frompartition E. The edges of said partition are in proximity to oppositewalls G, K of the stack, as

Patented Sept. 23, 1913.

shown in Fig. 1, so that said partition with the walls of said stacktogether form a vertical compartment or duct. The lower edge ofpartition M is connected to the ad- Lacent stack wall by a link N. Theremay e several such links connected to said partition and wall. Toartition M is attached a wire cord or rope which passes over a pulley P,supported on a bracket Q within the stack, and is led out of the stackthrough a suitable opening in the wall thereof. By means of the cord O,the partition M may be raised bodily from the position shown on theright to that shown on the left of Fig. 1, and when so raised, saidpartition is suspended by said cord, its edge L then being lifted out ofthe gutter F. The link N is then caused to assume a more nearlyhorizontal position. By reason of this raisin of the partition M, thearea of the intervz between its lower edge and the adjacent side wall ofthe stack is enlarged. The minimum area of this interval is attainedwhen the edge L of partition M rests in the gutter F, and the maximumarea when the partition is raised to bring the link N into anapproximately horizontal position. At they bottom of the stack isprovided a funnel-shaped tank R for water, which, at its constrictedend, communicates with a discharge pipe S, having a valve T. Anysuitable means for maintaining the water level constant ma be installed,such as the open vertical over owpipe U.

The operation is as follows: lVater admitted to gutter F by pipe l'l orpipes H and J escapes through the indentations in the edge of saidgutter, flows downwardly on the surface of partition M, and so' entersthe tank R. After the water in said tank rises to a predetermined level,the excess escapes continuously by pipe U, the level thus beingmaintained constant. The gas current entering by flue B, first impingesupon this descending water sheet, then passes downwardly in the duct Vformed between the stack wall D and partition M, an descapes at theconstricted opening W between said partition and wall. Practically allof the solid particles in said gas current which have not been caught bythe descending water sheet are projected downwardly upon the surface ofthe water in tank R and there trapped. Any which may escape are obligedto encounter the water falling in the Hue,

from the lower edge of partition M before` `cur, for example, 1nsteam-boilers using forced draft, which under special conditions or tomeet load emergencies, may` be driven temporarily much above theirnormal ratings. 'lhe opening W between partition M and stack wall mayatA the outset be fixed at such an area as, with a current. in the Hueof some predetermined normal velocity, will cause the particles to beprojected over a certain minimum distance to the water below, thevelocity of escape and the distance traversed being such as will resultin eHective trapping of the particles. This, for eX- ample, may berepresented by the position of the parts shown on the right of Fig. l.if now, the current velocity should increase the partition M is raised,thus enlarging the area of opening W, and increasing the distance ofthat opening from the water level, until the velocity of escape ot theparticles at said opening is reduced to that which they had prior tosaid increase; or, in other words, by varying the area of the outlet Wand the distance of Said outlet from the water level, the striking:torce of the particles upon the water below is kept substantiallyconstant. Where the current velocity in the Hue is to be normally high,and decreases therein are to be guarded against, the position of theparts shown on the lett of Fig. 2 may be the normal position, and a fallin velocity is then met by lowering the partition M, say to the positionshown on 'the right of Fig. 2, in order to increase the velocity ofcurrent discharge and reduce the interval overV which the particlesareprojected.

L The object of the indentations in the edge of.' gutter F is todistribute the How from said gutter over the surface of partition M,

yand to prevent said How being cut 0H by contact of partition andgutter, as might occur it the gutter edge were straight.

. The accumulation of solid matter in the tank R is removed from time totime by opening valve T, the Hue currents being temporarily shut 0H.

l claim:

l. A device for trapping particles in suspension in a gas current,comprising a Hue, a tank therein,,a vertical duct in said Huecommunicating at its upper portion with a .source of gas current,terminating above said tank and having a suspended wall, a

`link connecting said suspended wall to the opposite fixed wall of saidduct, and means for bodily raising and lowering said suspended wall.

2. A device for trapping particles in sus- 'ering said loose partition,and

pension in a gas current, cou'lprising a Hue, a partition thereinforming with the Hue walls a vertical duct having an inlet for gascurrent at its upper end and an outlet at its lower end, means forraising and lowering said partition and to vary the cross sectional areaof the outlet of said duct, and a tank disposed in said Hue below saidpartition.

3. A device tor trapping particles in suspension in a gas current,comprising a Hue, a tank therein, a partition extending in wardly from awall of said Hue, said Hue having a gas current inlet below saidpartition, a loose partition in said Hue forming with the Hue walls avertical duct and ter* minating above said tank, means 'tor suspendingsaid loose partition in proximity to the inner edge of said Hrst-namedparttion, and means for bodily raising and low* ering said loosepartition and to vary the cross sectional area of the outlet ot saidduct.

4. A device for trapping particles in suspensionin a gas current,comprising a Hue, a tank therein, a partition eXten wardly from a wallof said Hue, said Hue having a gas current inlet below said partition, aloose partition in said Hue forming with the Hue walls a vertical ductand terminating above said tank, means for suspending said loosepartition in promixity to the inner edge of said first named partition,and means for bodily raising and lowa link between said loose partitionand said Hue wall.

5.' A device for trapping particles in suspension in a gas current,comprising a Hue, a tank therein, a partition extending inwardly from awall of said Hue, said Hue having a gas current inlet below saidpartition, a loose partition in said Hue forming with the Hue walls avertical duct and disposed above said tank, means or suspending saidloose vpartition from said Hrstnamed (partition, and means for bodilyraising sai loose partition and to vary the cross sectional area of theoutlet of said duct.

6. A device for trapping particles in suspension in a gas current,comprising a Hue, a tank therein, a partition extending inwardly from awall of said Hue, said Hue havingv a gas current inlet below saidpartition and a water inlet above said partition, a loose partition insaid Hue forming with the Hue walls a vertical duct and terminatingabove said tank, and means for suspending said loose partition inproximity to the inner edge of said Hrst-named partition, and means forbodily raising and lowering said loose partition and tovary the crosssectional area of the outlet of said duct.

7. A device for trapping particles in suspension in a gas current,comprising a vering intical Hue, a tank therein, a partition extend inginwardly from a wall of said flue and having a gutter at its inner edge,said Hue having a gas current inlet below said partition, a loosepartition in said Hue forming with the Hue Walls a vertical duct andhaving its upper ed e bent over and received in said gutter anterminating at its lower edge above said tank, a link connecting saidloose partition to said Hue wall, and means for bodily raising andlowering said loose partition.

8. A device for trapping particles in suspension in a gas current,comprising a vertical Hue, a tank therein, a partition eXtendinginwardly from a wall of said Hue and having a gutter at its inner edge,said Hue having a gas current inlet below said partition and a waterinlet communicating with said gutter, a loose partition insaid Hueforming with the Hue walls a vertical duct and having its upper edgebent over` and received in said gutter and terminating at its lower edgeabove said tank, a link con- `necting said loose partition to saidHuewall,

and means for bodily raising and lowering said loose partition.

In testimony whereof I have affixed my signature in presence of twowitnesses.

THOMAS E. MURRAY.

Witnesses:

GERTRUDE T. PORTER, MAY T. MCGARRY.

